Hot-water or steam boiler.



P. W. HIDER.

HOT WATER 0R STEAM BOILER.

APPLICATION FILED MAR.18, 1911.

1,050, 1 35. v Patented Jan. 14, 1913.

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UNITED STATES PATENT @FFIQE;

FREDERICK W. HIDEB, 0F TQRONTO, ONTARIO, CANADA.

HOT-WATER OR STEAM BOILER.

To all whom it may concern:

Be it known that I, FREDERICK 1V. Hmnn, a subject of the King of GreatBritain, resident of the city of Toronto, in the county of York,Province of Ontario, in the Dominion of Canada, have invented certainnew and useful Improvements in Hot-Tater or Steam Boilers; and I dohereby declare that the following is a full, clear, and exactdescription of the same.

The invention relates to improvements in hot water or steam boilers, asdescribed in the following specification and illustrated in theaccompanying drawings that form part of the same.

The invention consists essentially in the novel construction andarrangement of parts whereby the gases of combustion from the combustionchamber inclosed by the brimary heating chamber are conducted around itsexterior and circulated in contact with a secondary heating chamber.

The objects of the invention are to utilize to the fullest extent theheating capacity of the gases of combustion, to obtain a very largeheating area, and to economize in the consumption of fuel.

In the drawings, Figure 1 is a vertical sectional view of a boilerconstructed in ac cordance with this invention. Fig. 2 is a verticalcross sectional view of the device.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 is the primary heating chamber having afire sheet 2, and a crown sheet 3 and inner and outer front heads 4: and5 and the inner and outer tube sheets 6 and 7 respectively.

8 is the fire door opening through the front heads 1 and 5 and 9 are thefire tubes extending between the sheets 6 and T.

10 is a steel ring arranged between the inner and outer shells of thechamber 1 at the bottom thereof to which said shells are firmly rivetedin a water tight joint. The chamber 1 is supported upon a suitable base11 having the inwardly extending flange 12 upon which the ring 10 rests.

13 are the grate bars extending across the combustion chamber 14 andresting on the inwardly extending edges of the flange 12.

15 is a boiler of the return tubular type supported midway of its lengthby a thread ed nipple l6 communicating vith the in- Specification ofLetters Eatent.

Application filed. March 18, 1911.

Patented J an. 14,1913.

Seria1 No. 615,412.

terior of the primary heating chamber 1 said nipple being arranged aboutmidway of the length of said heating chamber.

17 are upwardly extending flanges on the exterior of the casing 1extending from end to end thereof.

18 are flanges secured to the sides of the boiler 15 midway of itsheight and extending from end to end thereof.

19 are outer casing sections resting in the flanges 17 and extendingupwardly to the flanges 18 said sections extending from end to end ofthe boilers.

20 is a metal back preferably supported from the base 11 and inclosingthe rear ends of the chamber 1 and boiler 15 and having a smoke flue 21at the top thereof and a baffle plate 22 extending inwardly immediatelybelow the end of the boiler 15.

23 is a vertical baffle arranged within the back 20 opposite the firetubes 9 and forming an air space 24 at the lower end of said backwhichair space is provided with an opening 25 at the bottom thereof.

26 is a front shield resting on the top of the chamber 1 and extendingabove the fire tubes in the boiler 15.

The back 20 and shield 26 are united with the side sections 19 andinclose a fire chamber around the top and back of the chamber 1 andbottom and front and rear of the boiler 15.

27 are perforated tubes secured in the back 20 and extending inwardlybetween the chamber 1 and boiler 15, said tubes being open at the outerends and forming air passages.

In the use of this boiler the gases of com bustion first heat the waterin contact with the inner shell and passing through the fire tubes 9 arecarried upwardly and over the top of said chamber 1, the baffle 22directing the flow of gases along the under surface of the boiler 15.The gases of combustion in passing through the chamber between the twoboilers are revivified by a supply of fresh air entering the backthrough the opening 25 and also entering through the perforated tubes 27and said gases then passing through the tubes of the boiler 15 arecarried up through the smoke flue. The introduction of fresh air in thismanner to the space between the boilers assists the combustion of thegases very materially and acts as a very effective smoke consumer.

It will be seen from this description that the gases of combustion arecarried through a circuitous passage and are actively in contact withwater heating surfaces throughout their entire passage, consequently avery large heating area is presented to the fire and as the body ofwater is relatively small the result is that the water is heated veryquickly and will be retained at the desired temperature with the minimumconsumption of fuel.

The arrangement of the feed and return pipes to the boiler is such thatthe water is drawn off from the upper boiler 15 at the ends and thereturn pipes are connected to the chamber 1 at the bottom corners. Thecool water is thus brought in at the bottom of the boiler and risingflows to the center passing through the nipple 16 and is again dispersedtoward the ends of the boiler 15 in order to reach the outflow pipes. Avery effective circulation is thus provided.

An important feature in the arrangement of the connection between thetwo boilers is the use of the threaded nipple 16. With this arrangementthe nipple may be turned to adjust the height of the upper boiler.

What I claim as my invention is A hot water or steam boiler, comprising,a portable base and grate, a fire box formed of a double walled casingresting on said base and forming a water jacket and having fire tubes atthe rear end, a metal casing inclosing the rear end of said fire box andextending forwardly and supported from the side walls of said fire box,said casing having an opening in the top and a smoke flue at the rearend rising from the top, a fire tube boiler of shorter length than saidfire box supported in the opening in said casing and closing saidopening, a pipe connection joining said fire tube boiler to the waterjacket of said fire box and forming a water passage therebetween, and aba iiie plate projecting inwardly from the rear 01'' said metal casingimmediately below said upper boiler and directing the gases ofcoinbustion forwardly between said water jacket and said boiler.

Signed at the city of Toronto, Ontario, Canada this 13th day of March1911.

FREDERICK W. HIDER.

Witnesses A. DENNISON, B. TUoK.

Uopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

